There is a diagram of a ball being thrown in a horizontal diection at 30m/s and there is an angle of 48degrees and a side with 4m.

How long is the ball in the air?

I am confused because I am not sure of the equation. I know that is is something like y = yo + ? - 1/2gt^2

Thank you for the help.

You have not adequately described the situation. What angle is 48 degrees? What/where is the side with 4 meters?